You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Borderpoint|97" />
  </query-continue>
  <query>
    <pages>
      <page pageid="13" ns="0" title="Gazatteer" />
      <page pageid="37" ns="0" title="Lucius Delanoire" />
      <page pageid="61" ns="0" title="Locations" />
      <page pageid="95" ns="0" title="Journal" />
      <page pageid="151" ns="0" title="Play by Post" />
      <page pageid="323" ns="0" title="Arkham by Cyberlight Characters" />
      <page pageid="1303" ns="0" title="Firefly Journal" />
      <page pageid="1345" ns="0" title="Original Pathfinder Stats for Lucius" />
    </pages>
  </query>
</api>